Improvement in apparatus for tapering ferrules



UNITED STATES JOHN L. PARKER, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN APPARATUS FOR TAPERING FERRULES.

Specification forming part of Letters Patent No. 116,479, dated June'27, 1871.

To all whom it may concern:

Be it known that I, JOHN L. PARKER, ofthe city and county of Worcesterand Commonwealth of Massachusetts, have invented certain new and usefulImprovements in an Apparatus for Forming Tapering Ferrules; and I dohereby declare the following to be a full, clear, and eXact descriptionof the saine, reference being had to the accompanyingdrawing which formsa part of this specification, in which- Figure l represents a plan viewof the formingspindle and press-bed, With the parts above indicated bydotted lines. Fig. 2 represents a central vertical section ofthe formingmechanism. Fig. 3 represents a perspective view of the ferrule beforeentering the tapering-die, and Fig. 4 represents a perspective view ofthe linished ferrule.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will proceed to describe it more in detail.

The nature of my invention consists in an improved apparatus for'forming tapering ferrules from cold iron, whereby open or closedferrules can be formed with equal facility, as hereinafter described. Asferrules formed from cold iron have heretofore been made the mode ofconstruction has been such as to necessitate the leaving of their sidesstraight and parallel, similar to illustration, Fig. 3. The straightferrules are much used, but are not applicable to all classes ofmanufactures, as, in many instances, tapering ferrules are required;hence there is a great demand for a ferrule of a similar kind andquality to the above, but of a tapering form.

To supply such Want, and to produce a tapering cold-iron ferrule, eitheropen or closed at the end, is the object of my present invention.

The mechanism which I employ for imparting a tapering form to theferrules is illustrated by Figs. l and 2 of the drawing, wherein Aindicates a supporting or centering spindle to receive thepartially-formed ferrules. B indicates the forming-die; C, the bed-pieceof the press; and D, the movable head of the press, which rises anddescends With a regular or intermittent motion when the mechanism is inoperation. The parts herein shown are used in connection with a powerfulmechanical press, which may be constructed in any suitable form, andneed not herein be more fully described. The opening in the forming-dieB is turned out to the proper size andA taper which it is desired toimpart to the ferrules,

and the die is secured in a recess in the movable head D by means of apair of set-screws, E, in such position that when the press is in motionit will descend over the spindle A, as shown in Fig. 2. The spindle A isformed of the proper size to fit the interior of the ferrule at itsbase, but is turned more tapering than the matrix of the die, thusallowing suiiicient space bet-Ween the parts to enable the die torectify any irregularity in the position of the ferrule I upon thespindle. The spindle is provided with a shoulder, F, equal in width tothe thickness of the metal in the ferrules, and upon said shoulder theferrule I rests and is Wholly supported during the operation of taperingthe ferrule. The shank A of the spindle is formed somewhat tapering, andis iitted to a corresponding-shaped opening in the bed-piece C. It isalso furnished With a ilange or collar, a, which rests upon the top ofthe bed C and prevents the spindle from being pressed too far down intothe opening by the action of the press. The spindle A can be readilyremoved from the bed-piece C to exchange it for one of a different sizeby striking it upon its lower end with a hammer or other tool 5 and thedie B may be removed for a similar purpose by loosening the set-screw E.A discharging-pin, Gr, is tted looselyin the upper part of the. die Bfor forcing the finished ferrules therefrom. Said pin is provided with aflange, H, around its upper end to prevent it from dropping out ofplace, and it is operated by a cross-bar, J, arranged to Work up anddown in a vertical slot formed through the bed-piece D, from which itsends project in either direction, and Where it is retained in properposition by a center-pin, K, upon which it can move freely up and down,While it is prevented from moving laterally. When the die B and head Ddescend the pin G and cross-bar J are forced up'by the end of thespindle A or ferrule I pressing upon the bottom ofthe pin G; and whenthe hea-d D rises the set-screws L L in the ends of the bar J arebrought in contact with the frame of the pressing-machine, and thecross-bar J and pin G are thereby forced down, causing the ferrule I tobe expelled from the die. The screws L L may be so adjusted that theferrule Will he discharged from the die at the proper moment, to becarried away by some mechanism suitably arranged for that purpose, whichit is not necessaryv to herein describe.

The operation of forming the'tapcring ferrules from cold iron is asfollows: The ferrule I is rst drawn up straight from the disk or blankby the method and in the manner heretofore practiced for drawingcold-iron ferrules, lfor which Letters Patent were granted to J. H. GoleApril 28, 1868, No. 7 7, 170. The ferrule I, after being thus drawn, isturned off square at its base, and, in case it is to be an open ferrule,the cap or end is cut out, as shown in Fig. 3. It is then placed uponthe spindle A, with its square base resting' upon the shoulder F, andthe pressing mechanism is put into operation, and the die B is therebycaused t0 descend and embracethe ferrule I and spindle A, as illustratedin Fig. 2 of the drawing. The descending die embraces the ferrule uponall sides, and, as it is forced down, compresses and condenses the metalthereof at its upper end, thus diminishing its diameter so as to producethe desired taper, while, at the same time, the

thickness of metal and strength at the upper end of the ferrule areincreased. By the use of the shoulder F upon the spindle A, forsupporting the ferrules, I am enabled to form tapering fer,- rules fromcold iron with open ends.

Having described my improved Inode of forming tapering ferrules fromcold iron, what I claim therein as new and of my invention, and desireto secure by Letters Patent, is-

1. The combination of the block B having a tapering hole in it of thediameter and taper re- `quired for the ferrule externally, the mandrel Amore tapering than the hole in said'die-block, a support for saidmandrel, and mechanism to reciprocate die-block B, substantially as andfor the purpose described.

2. The combination, with the bed G and movable head D of thepower-press, of the centeringspindle A, forming-die B, discharging-pinG, and cross-bar J, substantially as and for the purposes set forth.

JOHN L. PARKER.

Witnesses:

Tnos, H. DODGE, A. E. PEIRCE.

